set EVAC := A B;
set DEST := C D E F;

param: EDGES : edgecapacity :=
    A B 10
    A C 20
    A D 20
    B C 40
    B D 20
    C E 30
    C F 40
;

param population :=
    A 10
    B 10
;

param capacity :=
    C 10
    D 10
    E 10
    F 10
;